各大网站都会在首页的上方两侧左右各挂一幅flash动画广告

http://bbs.iwebhome.net/index.php?showtopic=2192
你细心留意一下各大网站都会在首页的上方两侧左右各挂一幅flash动画广告,而该广告只是在用户的分辨率大于1024的情况下才显示,而在800的环境下是没有的,怎样实现呢?
根据个人工作的总结把实现上面的功能代码写出来,以作备忘和方便有需要的朋友:

lrbars.js

var rightbar;
var coupletcode;
rightbar = window.screen.width-150+20 +5; //定义右侧广告的位置

coupletcode = "<DIV id=leftbar style='LEFT: 5px; POSITION: absolute; TOP: 40px; VISIBILITY: hidden;' width=130>32</div> //显示左侧广告
<DIV id=rightbar style='LEFT: " + rightbar + "px; POSITION: absolute; TOP: 40px; VISIBILITY: hidden' width=130>32</div>"; //显示右侧广告

if (window.screen.width>=1024) //判断用户的屏幕分辨率是否大于或等于1024
{
document.write(coupletcode);
}

function InsertCouplet()
{
if (window.screen.width>=1024){ //如果用户屏幕分辩率大于或等于1024,则显示广告
document.all.leftbar.style.visibility = "visible";
document.all.rightbar.style.visibility = "visible";
document.all.leftbar.innerHTML = "<OBJECT classid=clsid:D27CDB6E-AE6D-11cf-96B8-444553540000

codebase=http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0 WIDTH=100 HEIGHT=300 id=leftB

ALIGN=> <PARAM NAME=movie VALUE=top1.swf> <PARAM NAME=quality VALUE=high><PARAM NAME=wmode> <EMBED id=leftBG src=top1.swf

quality=high WIDTH=100 HEIGHT=300 NAME=left ALIGN= TYPE=application/x-shockwave-flash

PLUGINSPAGE=http://www.macromedia.com/go/getflashplayer></EMBED></OBJECT>";
document.all.rightbar.innerHTML = "<OBJECT classid=clsid:D27CDB6E-AE6D-11cf-96B8-444553540000

codebase=http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0 WIDTH=100 HEIGHT=300 id=rightB

ALIGN=> <PARAM NAME=movie VALUE=top2.swf> <PARAM NAME=quality VALUE=high> <PARAM NAME=wmode VALUE=transparent><EMBED

id=rightBG src=top2.swf quality=high WIDTH=100 HEIGHT=300 wmode=transparent NAME=right ALIGN=

TYPE=application/x-shockwave-flash PLUGINSPAGE=http://www.macromedia.com/go/getflashplayer></EMBED></OBJECT>";

}
}
InsertCouplet();
function leftBG_DoFSCommand(){ //关闭两侧广告

document.all.leftbar.style.visibility = "hidden";
document.all.rightbar.style.visibility = "hidden";

}
function rightBG_DoFSCommand(){
leftBG_DoFSCommand();
}
<!--
if (document.all){
document.write("<script language=\"JavaScript\" For=\"rightB\" Event=\"FSCommand()\">\n");
document.write(" leftBG_DoFSCommand();\n");
document.write("</Script>\n");
document.write("<script language=\"JavaScript\" For=\"leftB\" Event=\"FSCommand()\">\n");
document.write(" rightBG_DoFSCommand();\n");
document.write("</Script>\n");
}
//-->

以上代码我是存在lrbars.js文件里,以方便其它页面调用

之后在要显示广告的页里加入以下
<script language="javascript" scr="lrbars.js"></script>
========================================
在一个网站的首页两侧的对联式广告是怎么做的？
请问是不是用层做的？

答：都是用层做的,关闭广告就是把相应的层隐藏
http://bbs.iwebhome.net/index.php?s=0dcc8008e7fe021afd2968b8eecb29aa&showtopic=2360&st=0&#entry4599

<DIV id=leftbar style='LEFT: 5px; POSITION: absolute; TOP: 210px; VISIBILITY: visible;' width=130>
<OBJECT classid=clsid:D27CDB6E-AE6D-11cf-96B8-444553540000 codebase=http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0 WIDTH=100 HEIGHT=300 id=leftB ALIGN=> <PARAM NAME=movie VALUE=http://XXXX.swf> <PARAM NAME=quality VALUE=high><PARAM NAME=wmode> <EMBED id=leftBG src=http://XXXX.swf quality=high WIDTH=100 HEIGHT=300 NAME=left ALIGN= TYPE=application/x-shockwave-flash PLUGINSPAGE=http://www.macromedia.com/go/getflashplayer></EMBED></OBJECT>
</div>

<DIV id=rightbar style='LEFT: 990px; POSITION: absolute; TOP: 210px; VISIBILITY: visible' width=130>
<OBJECT classid=clsid:D27CDB6E-AE6D-11cf-96B8-444553540000 codebase=http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0 WIDTH=100 HEIGHT=300 id=leftB ALIGN=> <PARAM NAME=movie VALUE=http://XXXXX.swf> <PARAM NAME=quality VALUE=high><PARAM NAME=wmode> <EMBED id=leftBG src=http://XXXXX.swf quality=high WIDTH=100 HEIGHT=300 NAME=left ALIGN= TYPE=application/x-shockwave-flash PLUGINSPAGE=http://www.macromedia.com/go/getflashplayer></EMBED></OBJECT>
</div>

关闭按钮上直接用
fscommand("quit");